,This 12-day window is one of the reasons why it can be hard to get rid of fleas.They avoid light and migrate toward cracks in the floor, where they remain for their development.Unlike their parents, the larvae don???t eat blood.Instead, they eat skin cells, flea droppings and other debris.They attach pieces of dirt and debris to their cocoons as camouflage.If food is plentiful, the adult flea eme